When Immortal Phoenix is killed by a spell like Hidden Blade or Cull the Weak, is it already in the trash when its ability triggers?

Ruling: Yes, Immortal Phoenix is already in the trash when its ability triggers after being killed by a spell.

Nuances:

• This is different from Darius Trifarian, who counts himself because he's already in play when his trigger happens
• Immortal Phoenix moves to the trash before its triggered ability resolves